Berutu, Sunneng, Haeni Budiati, Jatmika Jatmika, and Fornieli Gulo. “Data Preprocessing Approach for Machine Learning-Based Sentiment Classification”. JURNAL INFOTEL 15, no. 4 (November 13, 2023): 317-325. Accessed November 24, 2024. https://ejournal.ittelkom-pwt.ac.id/index.php/infotel/article/view/1030.